U.S. patent application number 15/904433 was filed with the patent office on 2018-06-28 for printing apparatus and paper supply apparatus.
This patent application is currently assigned to Nippon Primex Inc.. The applicant listed for this patent is Nippon Primex Inc.. Invention is credited to Manabu OMORI, Hitoshi SATO.
Application Number | 20180178558 15/904433 |
Document ID | / |
Family ID | 54833248 |
Filed Date | 2018-06-28 |
United States Patent
Application |
20180178558 |
Kind Code |
A1 |
SATO; Hitoshi ; et
al. |
June 28, 2018 |
PRINTING APPARATUS AND PAPER SUPPLY APPARATUS
Abstract
A printing apparatus includes a first and a second housing
parts, a printing part, and a conveying part which includes a
holding part that holds a first paper sheet and a second paper
sheet in an overlapped state and respectively pulled out from a
first paper roll and a second paper roll, and conveys the first
paper sheet out of the first paper sheet and the second paper sheet
held by the holding part to the printing part. The holding part
includes a contacting member contacting the second paper sheet out
of the first paper sheet and the second paper sheet in an
overlapped state, and an opposing member arranged opposing the
contacting member and contacting the first paper sheet. A first
frictional force between the contacting member and the second paper
sheet is larger than a second frictional force between the opposing
member and the first paper sheet.
Inventors: |
SATO; Hitoshi; (Yamanashi,
JP) ; OMORI; Manabu; (Yamanashi, JP) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
Nippon Primex Inc. |
Tokyo |
|
JP |
|
|
Assignee: |
Nippon Primex Inc.
Tokyo
JP
|
Family ID: |
54833248 |
Appl. No.: |
15/904433 |
Filed: |
February 26, 2018 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
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15361066 |
Nov 24, 2016 |
9937736 |
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15904433 |
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PCT/JP2015/056907 |
Mar 10, 2015 |
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15361066 |
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Current U.S.
Class: |
1/1 |
Current CPC
Class: |
B65H 2701/1311 20130101;
B65H 5/28 20130101; B65H 2701/1936 20130101; B65H 2301/4128
20130101; B41J 13/0009 20130101; B65H 2511/515 20130101; B65H
2301/4137 20130101; B65H 16/028 20130101; B65H 2513/512 20130101;
B65H 20/02 20130101; B41J 15/18 20130101; B41J 11/0095 20130101;
B65H 2301/41392 20130101; B65H 2511/51 20130101; B65H 19/12
20130101; B41J 15/042 20130101; B65H 2801/12 20130101; B65H 16/021
20130101; B65H 2404/722 20130101 |
International
Class: |
B41J 13/00 20060101
B41J013/00; B65H 5/28 20060101 B65H005/28; B65H 16/02 20060101
B65H016/02; B65H 20/02 20060101 B65H020/02; B65H 19/12 20060101
B65H019/12; B41J 15/04 20060101 B41J015/04; B41J 11/00 20060101
B41J011/00; B41J 15/18 20060101 B41J015/18 |
Foreign Application Data
Date |
Code |
Application Number |
Jun 10, 2014 |
JP |
2014-120041 |
Claims
1. A printing apparatus, comprising: a first housing part that
houses a first paper roll that is a roll of a first paper sheet; a
second housing part that houses a second paper roll that is a roll
of a second paper sheet; a printing part that prints on the first
paper sheet and the second paper sheet; and a conveying part
including a holding part that is configured to hold the first paper
sheet and the second paper sheet in an overlapped state, the first
paper and the second paper sheet being respectively pulled out from
the first paper roll and the second paper roll, the conveying part
conveying the first paper sheet out of the first paper sheet and
the second paper sheet held by the holding part to the printing
part, wherein the holding part includes a contacting member that
contacts the second paper sheet out of the first paper sheet and
the second paper sheet in an overlapped state, and an opposing
member that is arranged opposing the contacting member and contacts
the first paper sheet, and a first frictional force between the
contacting member and the second paper sheet is larger than a
second frictional force between the opposing member and the first
paper sheet.
2. The printing apparatus according to claim 1, wherein the
conveying part further includes a conveying roller that is provided
on the downstream side of the holding part in the conveying
direction, and conveys the first paper sheet out of the first paper
sheet and the second paper sheet held by the holding part to the
printing part, and the contacting member is a paper feeding roller
that is provided on the upstream side of the conveying roller in
the conveying direction, and feeds the first paper sheet from the
first paper roll to the conveying roller or feeds the second paper
sheet from the second paper roll to the conveying roller.
3. The printing apparatus according to claim 2, wherein the paper
feeding roller is connected to a driving source, and the conveying
roller conveys the first paper sheet out of the first paper sheet
and the second paper sheet held by the holding part to the printing
part when the paper feeding roller is kept in a rotation stop state
by the driving source.
4. The printing apparatus according to claim 2, wherein the
opposing member is a guiding member that guides one of the first
paper sheet and the second paper sheet to the paper feeding roller,
and the holding part further includes a biasing member that biases
the opposing member towards the contacting member.
5. The printing apparatus according to claim 2, further comprising:
a gap adjusting part that adjusts a gap between the contacting
member and the opposing member, wherein the gap adjusting part
makes the gap when the conveying roller conveys the second paper
sheet to the printing part larger than the gap when the paper
feeding roller conveys the second paper sheet to the conveying
roller.
6. The printing apparatus according to claim 2, further comprising:
a regulating member that regulates the front ends of the first
paper sheet and the second paper sheet to be positioned on the
upstream side of the conveying roller when the first paper sheet
pulled out from the first paper roll or the second paper sheet
pulled out from the second paper roll is set to the holding part
being openable and closable in a state where the holding part is
opened.
7. A paper supply apparatus, comprising: a first housing part that
houses a first paper roll that is a roll of a first paper sheet; a
second housing part that houses a second paper roll that is a roll
of a second paper sheet; and a conveying part including a holding
part that is configured to hold the first paper sheet and the
second paper sheet in an overlapped state, the first paper and the
second paper sheet being respectively pulled out from the first
paper roll and the second paper roll, the conveying part conveying
the first paper sheet out of the first paper sheet and the second
paper sheet held by the holding part to a printing part, wherein
the holding part includes a contacting member that contacts the
second paper sheet out of the first paper sheet and the second
paper sheet in an overlapped state, and an opposing member that is
arranged opposing the contacting member and contacts the first
paper sheet, and a first frictional force between the contacting
member and the second paper sheet is larger than a second
frictional force between the opposing member and the first paper
sheet.
8. The paper supply according to claim 7, wherein the conveying
part further includes a conveying roller that is provided on the
downstream side of the holding part in the conveying direction, and
conveys the first paper sheet out of the first paper sheet and the
second paper sheet held by the holding part to the printing part,
and the contacting member is a paper feeding roller that is
provided on the upstream side of the conveying roller in the
conveying direction, and feeds the first paper sheet from the first
paper roll to the conveying roller or feeds the second paper sheet
from the second paper roll to the conveying roller.
9. The paper supply apparatus according to claim 8, wherein the
paper feeding roller is connected to a driving source, and the
conveying roller conveys the first paper sheet out of the first
paper sheet and the second paper sheet held by the holding part to
the printing part when the paper feeding roller is kept in a
rotation stop state by the driving source.
10. The paper supply apparatus according to claim 8, wherein the
opposing member is a guiding member that guides one of the first
paper sheet and the second paper sheet to the paper feeding roller,
and the holding part further includes a biasing member that biases
the opposing member towards the contacting member.
11. The paper supply apparatus according to claim 8, further
comprising: a gap adjusting part that adjusts a gap between the
contacting member and the opposing member, wherein the gap
adjusting part makes the gap when the conveying roller conveys the
second paper sheet to the printing part larger than the gap when
the paper feeding roller conveys the second paper sheet to the
conveying roller.
12. The paper supply apparatus according to claim 8, further
comprising: a regulating member that regulates the front ends of
the first paper sheet and the second paper sheet to be positioned
on the upstream side of the conveying roller when the first paper
sheet pulled out from the first paper roll or the second paper
sheet pulled out from the second paper roll is set to the holding
part in a state where the holding part is opened, the holding part
being configured to become opened and closed.
Description
CROSS-REFERENCE TO RELATED APPLICATIONS
[0001] This application is a continuation application of and claims
the priority benefit of U.S. patent application Ser. No.
15/361,066, filed on Nov. 24, 2016, now pending, which is a
continuation application of PCT International Application number
PCT/JP2015/056907, filed on Mar. 10, 2015, which claims priority
under 35 U.S.C .sctn. 119(a) to Japanese Patent Application No.
2014-120041, filed on Jun. 10, 2014. Each of the above
application(s) is hereby expressly incorporated by reference, in
its entirety, into the present application.
BACKGROUND OF THE INVENTION
[0002] The present invention relates to a printing apparatus, a
paper supply apparatus, and a paper supply method for printing on a
paper sheet pulled out from a plurality of paper rolls.
[0003] A printing apparatus that houses, for example, two paper
rolls and prints on a paper sheet pulled out from each paper roll
with a printing part is used as a printing apparatus for printing
on a paper roll. In this printing apparatus, a conveyance path and
a discharging part dedicated for a paper sheet pulled out from each
of the paper rolls are provided.
[0004] Conventionally, a method for sharing a part of the
conveyance paths of the two paper rolls has been proposed. The
printing apparatuses disclosed in Japanese Unexamined Patent
Application Publication No. 2006-341989 and Japanese Unexamined
Patent Application Publication No. 2001-105676 include dedicated
paths for conveying each of the two paper rolls, a common path
positioned in a downstream side of the dedicated paths, and a
printing part provided on the common path, and print on the paper
rolls conveyed to the common path from the dedicated path.
[0005] However, because the printing apparatuses disclosed in
Japanese Unexamined Patent Application Publication No. 2006-341989
and Japanese Unexamined Patent Application Publication No.
2001-105676 require the dedicated paths for each paper roll,
components such as a roller and a sensor were required for the
dedicated paths, and spaces for installing the components are
required. Further, operations of the roller and the sensor had to
be controlled for each dedicated path.
BRIEF SUMMARY OF THE INVENTION
[0006] This invention focuses on these points, and an object of the
invention is to properly convey each paper sheet of a plurality of
paper rolls to a printing part with a simple configuration.
[0007] In one aspect of the present invention, a printing apparatus
is provided and includes a first housing part that houses a first
paper roll that is a roll of a first paper sheet; a second housing
part that houses a second paper roll that is a roll of a second
paper sheet; a printing part that prints on the first paper sheet
and the second paper sheet; and a conveying part including a
holding part that is configured to hold the first paper sheet and
the second paper sheet in an overlapped state, the first paper and
the second paper sheet being respectively pulled out from the first
paper roll and the second paper roll, the conveying part conveying
the first paper sheet out of the first paper sheet and the second
paper sheet held by the holding part to the printing part, wherein
the holding part includes a contacting member that contacts the
second paper sheet out of the first paper sheet and the second
paper sheet in an overlapped state, and an opposing member that is
arranged opposing the contacting member and contacts the first
paper sheet, and a first frictional force between the contacting
member and the second paper sheet is larger than a second
frictional force between the opposing member and the first paper
sheet.
[0008] In another one aspect of the present invention, a paper
supply apparatus is provided and includes: a first housing part
that houses a first paper roll that is a roll of a first paper
sheet; a second housing part that houses a second paper roll that
is a roll of a second paper sheet; and a conveying part including a
holding part that is configured to hold the first paper sheet and
the second paper sheet in an overlapped state, the first paper and
the second paper sheet being respectively pulled out from the first
paper roll and the second paper roll, the conveying part conveying
the first paper sheet out of the first paper sheet and the second
paper sheet held by the holding part to a printing part, wherein
the holding part includes a contacting member that contacts the
second paper sheet out of the first paper sheet and the second
paper sheet in an overlapped state, and an opposing member that is
arranged opposing the contacting member and contacts the first
paper sheet, and a first frictional force between the contacting
member and the second paper sheet is larger than a second
frictional force between the opposing member and the first paper
sheet.
BRIEF DESCRIPTION OF THE DRAWINGS
[0009] FIG. 1 shows a perspective view of a printer 11 according to
one exemplary embodiment of the present invention.
[0010] FIG. 2 shows a right side view of the printer 11.
[0011] FIG. 3 shows a left side view of the printer 11.
[0012] FIG. 4 shows a plane view of the printer 11.
[0013] FIG. 5 shows a bottom view of the printer 11.
[0014] FIG. 6 shows a back view of the printer 11.
[0015] FIG. 7 shows a front view of the printer 11.
[0016] FIG. 8 shows a perspective view of a longitudinal section of
the printer 11 as seen from the right side.
[0017] FIG. 9 shows a longitudinal section of the printer 11 as
seen from the right side.
[0018] FIG. 10 shows a perspective view of a longitudinal section
of the printer 11 as seen from the left side.
[0019] FIG. 11 shows a longitudinal section of the printer 11 as
seen from the left side.
[0020] FIG. 12 shows a state where a paper feeding roller 14a feeds
a paper sheet P1.
[0021] FIG. 13 shows a state where the paper feeding roller 14a is
opened and a paper sheet P2 is put on the paper sheet P1.
[0022] FIG. 14 shows the paper feeding roller 14a in a closed
state.
[0023] FIG. 15A shows a schematic diagram for explaining positions
of a paper feeding stage 14b according to a conveyance state of a
paper sheet.
[0024] FIG. 15B shows a schematic diagram for explaining positions
of a paper feeding stage 14b according to a conveyance state of a
paper sheet.
[0025] FIG. 15C shows a schematic diagram for explaining positions
of a paper feeding stage 14b according to a conveyance state of a
paper sheet.
[0026] FIG. 16 shows a state where there is no first paper roll
21.
[0027] FIG. 17 shows a state where the paper feeding roller 14a
feeds the paper sheet P2.
[0028] FIG. 18 shows a state where a conveying roller 14d conveys
the paper sheet P2.
[0029] FIG. 19 shows a state where the paper roll 22 is housed in a
first housing part 23.
[0030] FIG. 20 shows a flow chart of operation of the printer 11
when the first paper roll 21 is set to the first housing part
23.
[0031] FIG. 21 shows a flow chart of operation of the printer 11
when the second paper roll 22 is set to a second housing part
24.
[0032] FIG. 22 shows a flow chart of operation of the printer 11
when a first roll of the first paper roll 21 runs out.
DETAILED DESCRIPTION OF THE INVENTION
[0033] <1. Configuration of a Printer>
[0034] A configuration of a printer 11 that is an example of a
printing apparatus according to the present invention is explained
with reference to FIGS. 1 to 14. FIG. 1 shows a perspective view of
the printer 11 according to one exemplary embodiment of the present
invention. FIG. 2 shows a right side view of the printer 11. FIG. 3
shows a left side view of the printer 11. FIG. 4 shows a plane view
of the printer 11. FIG. 5 shows a bottom view of the printer 11.
FIG. 6 shows a back view of the printer 11. FIG. 7 shows a front
view of the printer 11. FIG. 8 shows a perspective view of a
longitudinal section of the printer 11 as seen from the right side.
FIG. 9 shows a longitudinal section of the printer 11 as seen from
the right side. FIG. 10 shows a perspective view of a longitudinal
section of the printer 11 as seen from the left side. FIG. 11 shows
a longitudinal section of the printer 11 as seen from the left
side. FIG. 12 shows a state where a paper feeding roller 14a feeds
a paper sheet P1. FIG. 13 shows a state where the paper feeding
roller 14a is opened and a paper sheet P2 is put on the paper sheet
P1. FIG. 14 shows the paper feeding roller 14a in a closed state.
It should be noted that FIGS. 1 to 11 show the printer 11 in which
a paper roll is not yet set.
[0035] The printer 11 is an apparatus that prints on a paper sheet
pulled out from a paper roll, and then cuts the paper sheet at a
predetermined length and discharges the paper sheet. The printer 11
may be incorporated in, for example, a point of sale (POS) system
terminal and a ticket issuing machine as an output apparatus. The
printer 11 according to the present embodiment is capable of
housing two paper rolls and is capable of continuously printing on
another paper roll when one of the paper rolls runs out during
printing. As shown in FIGS. 1 to 11, the printer 11 includes a
printing part 12, a paper tray 13, a conveying part 14, a cutting
part 40, and a controlling part 50.
[0036] As shown in FIG. 13, the paper tray 13 is capable of housing
a first paper roll 21 and a second paper roll 22. The paper tray 13
houses the first paper roll 21 and the second paper roll 22 in a
line along a horizontal direction. As shown in FIG. 11, the paper
tray 13 includes a first housing part 23, a second housing part 24,
a lever 25, a convex part 26, a roller 28, and a detecting sensor
S2.
[0037] The first housing part 23 houses the first paper roll 21
that is a roll of a first paper sheet P1. The second housing part
24 houses the second paper roll 22 that is a roll of a second paper
sheet P2. The first housing part 23 is positioned at a downstream
side of the second housing part 24 in a pull-out direction of the
paper sheet P1. Further, the second housing part 24 is arranged at
a slightly higher position than the first housing part 23. In the
present exemplary embodiment, the first paper roll 21 and the
second paper roll 22 have no core. Accordingly, there is no need to
collect the core when the first paper roll 21 and the second paper
roll 22 run out. However, the first paper roll 21 and the second
paper roll 22 are not limited as above and may have cores.
[0038] The detecting sensor S2 is provided at a bottom part of the
second housing part 24 and detects the presence of the second paper
roll 22. A transmission-type or a reflection-type photo interrupter
including a light emitting part and a light receiving part, for
example, is used as the detecting sensor S2. It should be noted
that the detecting sensor S2 may be a detecting switch instead of a
photo interrupter.
[0039] The lever 25 is rotatably supported at the bottom part of
the second housing part 24 and causes the light emitted from the
light-emitting part of the detecting sensor S2 to be blocked or
passed. For example, as shown in FIG. 13, when the second paper
roll 22 is set to the second housing part 24, the lever 25 is
rotated downward and moved to a position to block the light. When
the light is blocked by the lever 25 and the light-receiving part
does not receive the light, the detecting sensor S2 detects that
the second paper roll 22 is in the second housing part 24.
[0040] It should be noted that the detecting sensor S2 and the
lever 25 do not have to be provided in the second housing part 24.
Further, a detecting sensor for detecting the presence of the first
paper roll 21 and the remainder of the first paper roll 21 may be
installed in the first housing part 23. When the second paper roll
22 in the second housing part 24 is moved to the first housing part
23 as explained below, this detecting sensor detects the presence
and the remainder of the second paper roll 22 in the first housing
part 23.
[0041] As shown in FIG. 11, the convex part 26 is provided between
the first housing part 23 and the second housing part 24. The
convex part 26 has a function that regulates the movement of the
second paper roll 22 housed in the second housing part 24 towards
the first housing part 23.
[0042] The roller 28 is rotatably provided in the first housing
part 23. As shown in FIG. 12, the roller 28 has a function for
smoothly pulling out the paper sheet P1 from the first paper roll
21 by touching the outer peripheral surface of the first paper roll
21. In the present exemplary embodiment, a plurality of the rollers
28 is provided for stabilizing the behavior of the first paper roll
21 when the paper sheet P1 is pulled out. It should be noted that
the first housing part 23 is provided with a damper member (not
shown in figures) for stabilizing the behavior of the paper roll 21
in a crosswise direction by touching side faces of the paper roll
21. The damper members are provided on both sides of the first
paper roll 21 in the crosswise direction.
[0043] Further, the paper tray 13 houses two paper rolls (the first
paper roll 21 and the second paper roll 22) in the above, but it is
not limited to this. For example, the printer 11 may include a
paper tray that is capable of housing three paper rolls or
more.
[0044] The conveying part 14 pulls out the paper sheet P1 or the
paper sheet P2 from the first paper roll 21 or the second paper
roll 22 and conveys it to the printing part 12. In the present
exemplary embodiment, the conveying part 14 includes a common
conveying path R (FIG. 11) that conveys both of the paper sheet P1
and the paper sheet P2, and does not include a conveying path
dedicated for the paper sheet P1 and a conveying path dedicated for
the paper sheet P2. In this manner, the number of components can be
reduced and the printer 11 can be miniaturized compared with a case
where the conveying path dedicated for the paper sheet P I and the
conveying path dedicated for the paper sheet P2 are provided.
[0045] The conveying path 14 includes a holding part 19 (FIG. 14),
on the common conveying path R, that can hold both of the
overlapping paper sheet P1 and paper sheet P2 respectively pulled
out from the first paper roll 21 and the second paper roll 22. When
the paper sheet P1 and the paper sheet P2 are held by the holding
part 19, the conveying part 14 conveys the paper sheet P1 to the
printing part 12 and conveys the paper sheet P2 to the printing
part 12 when the paper sheet P1 runs out. Thus, the conveying part
14 does not let the paper sheet P1 and the paper sheet P2 held by
the holding part 19 be multi-fed, and conveys the paper sheets one
by one. It should be noted that the detailed configuration of the
conveying part 14 including the holding part 19 is explained
below.
[0046] The printing part 12 prints on the paper sheet P1 or the
paper sheet P2 conveyed by the conveying part 14. The printing part
12 includes a thermal head and prints characters, figures, and the
like on a paper sheet here. It should be noted that the printing
part 12 may include, for example, a head that ejects ink to the
paper sheet instead of the thermal head.
[0047] The cutting part 40 cuts the paper sheet P1 or the paper
sheet P2 that is printed on by the printing part 12 to be a
predetermined length. The cutting part 40 includes, for example, a
fixed blade and a movable blade, and cuts the paper sheet by making
the movable blade move while holding the paper sheet with the fixed
blade. The paper sheet cut by the cutting part 40 is discharged
from a discharging port.
[0048] The controlling part 50 controls operation of the printer 11
as a whole. The controlling part 50 controls the operation of the
conveying part 14, the printing part 12, the cutting part 40, and
the like by executing a program stored in a storing part. For
example, the controlling part 50 performs conveyance control of the
paper sheet P1 and the paper sheet P2 that are conveyed through the
common conveying path R. It should be noted that the details of the
conveyance control of the paper sheet P1 and the paper sheet P2 are
explained below.
[0049] <2. A Detailed Configuration of the Conveying Part
14>
[0050] A detailed configuration of the conveying part 14 is
explained with reference to FIGS. 11 to 14. The conveying part 14
includes a paper feeding roller 14a, a paper feeding stage 14b, a
conveying roller 14d, an opening-closing part 16, a spring member
17, a stopper 18, a gap adjusting part 30 (FIG. 3), a paper sheet
sensor S1, and a paper sheet sensor S3. In the present exemplary
embodiment, the paper feeding roller 14a is a conveying roller on
the upstream side, and the conveying roller 14d is a conveying
roller on the downstream side. Further, the paper feeding roller
14a and the paper feeding stage 14b constitute the above-mentioned
holding part 19. Hereinafter, the above-mentioned configuration
components are explained in order along a feeding direction of the
paper sheets P1 and P2.
[0051] <A Paper Sheet Sensor S1>
[0052] The paper sheet sensor S1 is provided in the vicinity of a
paper sheet inserting port 14c of the common conveying path R. The
paper sheet sensor S1 is a sensor for detecting the number of
sheets of paper (any of two, one, and zero sheets). Specifically,
the paper sheet sensor S1 detects the number of sheets of paper by
using a fact that a voltage, that is an output value, varies in
accordance with the number of sheets of paper.
[0053] Further, the paper sheet sensor S1 has a function of a
detecting sensor for detecting the presence of the paper sheet P1
when the holding part 19 holds the paper sheet P1 and the paper
sheet P2. As mentioned above, the paper sheet P1 is conveyed first
when the holding part 19 holds the paper sheet P1 and the paper
sheet P2, and the paper sheet P2 is conveyed after the paper sheet
P1 runs out. For this reason, the paper sheet sensor S1 detects
that there is no paper sheet P1 when the number of sheets of paper
changes from two to one.
[0054] It should be noted that the paper sheet sensor S1 detects
two, one, or zero sheets as the number of sheets of paper in the
above, but it is not limited to this. For example, the paper sheet
sensor S1 may detect one or zero sheets as the number of sheets of
paper. Specifically, when the first paper roll is housed in the
first housing part 23 and the second paper roll is housed in the
second housing part 24, the paper sheet sensor S1 detects that the
number of sheets of paper is one. Then, when the paper sheet sensor
S1 detects the number of sheets of paper is one and also a
detecting sensor S2 provided in the second housing part 24 detects
the presence of a paper roll in the second housing part 24, the
number of sheets of paper held by the holding part 19 can be
determined to be two.
[0055] [The Paper Feeding Roller 14a and the Paper Feeding Stage
14b]
[0056] As shown in FIG. 12, the paper feeding roller 14a pulls out
the paper sheet P1 from the first paper roll 21 and feeds it to the
conveying roller 14d. Further, the paper feeding roller 14a pulls
out the paper sheet P2 from the second paper roll 22 and feeds it
to the conveying roller 14d. The paper feeding roller 14a is
connected to a motor (a stepping motor herein) of a driving part 15
(FIG. 1) and rotates by receiving a driving force from the motor to
feed the paper sheet.
[0057] The paper feeding stage 14b is provided under the paper
feeding roller 14a to oppose to the paper feeding roller 14a. The
paper feeding stage 14b includes a function of a guiding member
that guides the paper sheet P1 or the paper sheet P2 fed by the
paper feeding roller 14a. Further, the paper feeding stage 14b
vertically moves between a holding position for holding the paper
sheet and a separated position at which the paper feeding stage 14b
is separated from the paper feeding roller 14a and does not hold
the paper sheet.
[0058] FIG. 15 shows a schematic diagram for explaining positions
of the paper feeding stage 14b according to a conveyance state of
the paper sheet. As shown in FIG. 15A, the paper feeding stage 14b
is at the holding position when two sheets of paper are on the
common conveying path R (when the holding part 19 holds the paper
sheet P1 and the paper sheet P2) and the conveying roller 14d
conveys the paper sheet P1. Further, as shown in FIG. 15B, the
paper feeding stage 14b is at the holding position when only one
sheet of paper is on the common conveying path R and the paper
feeding roller 14a feeds the paper sheet to the conveying roller
14d. On the other hand, as shown in FIG. 15C, the paper feeding
stage 14b is at the separated position when only one sheet of paper
is on the common conveying path R and the conveying roller 14d
conveys the paper sheet.
[0059] When the paper sheet P1 and the paper sheet P2 in an
overlapped state are held by the paper feeding roller 14a and the
paper feeding stage 14b, which are the holding part 19, the paper
feeding stage 14b contacts the paper sheet P1 and the paper feeding
roller 14a contacts with the paper sheet P2 as shown in FIG. 15A.
That is, the paper feeding roller 14a also functions as a
contacting member that contacts the paper sheet P2 out of the paper
sheet P1 and paper sheet P2 in the overlapped state.
[0060] In the present exemplary embodiment, when the holding part
19 holds the paper sheet P1 and the paper sheet P2, the paper sheet
P1 is conveyed by the conveying roller 14d on the downstream side.
On this occasion, the paper sheet P2 out of the overlapping paper
sheet P1 and paper sheet P2 is not conveyed to the downstream side
by a frictional resistance of the contacting paper feeding roller
14a. On the other hand, because the frictional resistance between
the paper sheet P1 and the paper sheet P2 is small, the paper sheet
P1 is conveyed to the downstream side by the conveying roller
14d.
[0061] Further, in the present exemplary embodiment, materials for
the paper feeding roller 14a and the paper feeding stage 14b are
selected such that a first frictional resistance between the paper
feeding roller 14a and the paper sheet P2 is larger than a second
frictional resistance between the paper feeding stage 14b and the
paper sheet P1. For example, the paper feeding roller 14a is a
roller made of rubber, and the paper feeding stage 14b is a plate
made of metal. In this manner, the paper sheet P2 can be
effectively prevented from being conveyed when the paper sheet P1
is conveyed. It should be noted that the paper feeding roller 14a
is not limited to the above example and may be a roller made of
metal such as SUS as long as the first frictional resistance is
larger than the second frictional resistance.
[0062] Furthermore, the paper feeding roller 14a feeds a front end
of the paper sheet P2 held by the holding part 19 to the conveying
roller 14d when the paper sheet sensor S1 detects no presence of
the paper sheet P1 out of the paper sheet P1 and the paper sheet
P2. In such a case, the conveying roller 14d starts conveying the
paper sheet P2 to the printing part 12.
[0063] [The Spring Member 17]
[0064] The spring member 17 provided to the lower part of the paper
feeding stage 14b is a biasing member that biases the paper feeding
stage 14b towards the paper feeding roller 14a. The paper feeding
stage 14b is at the holding position by receiving the bias force of
the spring member 17, and holds the paper sheet P1 and the paper
sheet P2 between the paper feeding roller 14a. It should be noted
that the spring member 17 biases the paper feeding stage 14b in the
above but it is not limited to this. For example, the spring member
17 may bias the paper feeding roller 14a towards the paper feeding
stage 14b.
[0065] [The Gap Adjusting Part 30]
[0066] The gap adjusting part 30 adjusts a gap between the paper
feeding roller 14a and the paper feeding stage 14b that is biased
by the spring member 17. In the present exemplary embodiment, the
gap adjusting part 30 adjusts the gap by moving the paper feeding
stage 14b vertically between the holding position and the separated
position. The gap adjusting part 30 resists the bias force of the
spring member 17 and moves the paper feeding stage 14b downwards
from the holding position to the separated position. The gap
between the paper feeding roller 14a and the paper feeding stage
14b when the paper feeding stage 14b is at the separated position
(see FIG. 15C) is larger than the gap when the paper feeding stage
14b is at the holding position (see FIG. 15A). In this manner, the
paper feeding roller 14a and the conveying roller 14d can smoothly
convey the paper sheet P1 and the paper sheet P2. The gap adjusting
part 30 includes a gear 31 as shown in FIG. 3, and the gear 31
rotates by receiving a power of a driving source such that the
paper feeding stage 14b moves vertically.
[0067] [The Opening-Closing Part 16]
[0068] As shown in FIG. 13 and FIG. 14, the opening-closing part 16
rotates around an axis 16a between an opening position and a
closing position. The opening-closing part 16 supports the paper
feeding roller 14a and the paper feeding roller 14a included in the
holding part 19 also is opened and closed by interlocking with the
opening-closing part 16.
[0069] A user can set the paper sheet P1 and the paper sheet P2 on
the paper feeding stage 14b when the opening-closing part 16 is at
the opening position (the paper feeding roller 14a is at the
opening position) (FIG. 13).
[0070] A handle 16b for a user to rotate the opening-closing part
16 is provided to the opening-closing part 16. For example, the
opening-closing part 16 rotates from the closing position to the
opening position as the user raises the handle 16b. It should be
noted that there may be a first opening position and a second
opening position as the opening position. The first opening
position is a position where the opening-closing part 16 is fully
opened, and the second opening position is a position where the
opening angle of the opening-closing part 16 is smaller than that
of the first opening position. The user can set the paper sheet on
the paper feeding stage 14b not only when the opening-closing part
16 is at the first opening position but also at the second opening
position. In such a case, because the user rotates the
opening-closing part 16 to the second opening position to set the
paper sheet, and also because the opening-closing part 16 can be
stopped from being further rotated from the first opening position
by the user, the opening-closing part 16 can be prevented from
being damaged by receiving an excessive load.
[0071] [A Stopper 18]
[0072] The stopper 18 is positioned above the paper feeding stage
14b on the downstream side in the conveying direction of the
holding part 19. Further, the stopper 18 is supported by the axis
16a of the opening-closing part 16 and rotates by interlinking with
the rotation of the opening-closing part 16. The stopper 18
includes an eccentric part 18a that is at an eccentric position
with respect to the axis in a radial direction. When the
opening-closing part 16 is at the closing position, the eccentric
part 18a is positioned at a separated position where the eccentric
part 18a is away from the paper feeding stage 14b (see FIG. 11),
and when the opening-closing part 16 is at the opening position,
the eccentric part 18a is positioned at a contacting position where
the eccentric part 18a contacts the paper feeding stage 14b (see
FIG. 13).
[0073] Additionally, when the eccentric part 18a is at the
contacting position, the front end of the paper sheet P1 or the
paper sheet P2 set on the paper feeding stage 14b cannot be
positioned on the downstream side from the stopper 18 in the
conveyance direction as shown in FIG. 13. That is, the stopper 18
is a regulating member that regulates the front end of the paper
sheet P1 or the paper sheet P2 to be arranged on the upstream side
from the conveying roller 14d when the paper sheet P1 or the paper
sheet P2 is set on the paper feeding stage 14b when the paper
feeding roller 14a is open.
[0074] [A Paper Sheet Sensor S3]
[0075] The paper sheet sensor S3 is a sensor for detecting the
paper sheet P1 or the paper sheet P2 that is fed by the paper
feeding roller 14a to the conveying roller 14d. The paper sheet
sensor S3 is provided in the vicinity of the upstream side of the
conveying roller 14d in the conveying direction.
[0076] [The Conveying Roller 14d]
[0077] The conveying roller 14d is provided on the downstream side
of the paper sheet sensor S3 in the conveying direction and conveys
the paper sheet P1 and the paper sheet P2. The conveying roller 14d
conveys the paper sheet P1 and the paper sheet P2 fed by the paper
feeding roller 14a to the downstream side. Here, because a paper
sheet conveyance speed by the paper feeding roller 14a is smaller
than the paper sheet conveyance speed by the conveying roller 14d,
the paper feeding roller 14a does not rotate when the conveying
roller 14d conveys the paper sheet P1.
[0078] The conveying roller 14d is arranged at a position opposing
a head of the printing part 12 and functions as a platen. Further,
when the holding part 19 (the paper feeding roller 14a and the
paper feeding stage 14b) holds the paper sheet P1 and the paper
sheet P2, the conveying roller 14d conveys the paper sheet P1 out
of the paper sheet P1 and the paper sheet P2.
[0079] It should be noted that the paper sheet conveyance speed by
the paper feeding roller 14a and the paper sheet conveyance speed
by the conveying roller 14d are different in the above, but it is
not limited to this. For example, while the paper sheet conveyance
speeds by the paper feeding roller 14a and the conveying roller 14d
are the same, the paper sheet conveyance force of the conveying
roller 14d may be larger than the paper sheet conveying force of
the paper feeding roller 14a. In such a case, when the conveying
roller 14d conveys the paper sheet P1, the paper sheet is smoothly
transferred as the paper feeding roller 14a is not being
rotated.
[0080] The conveying roller 14d is at the position opposing the
head of the printing part 12 (a head 12a shown in FIG. 15) in the
above, but it is not limited to this. For example, the conveying
roller 14d may be arranged on the upstream side from the printing
part 12 in the conveying direction.
[0081] <3. A Conveyance Control of the Paper Sheet>
[0082] As explained above, the conveying part 14 conveys the paper
sheet in a condition where two sheets of papers are set to the
holding part 19 (the paper feeding roller 14a and the paper feeding
stage 14b), that is, the paper sheet P1 and the paper sheet P2 are
held. In the present exemplary embodiment, the controlling part 50
performs below-mentioned control to smoothly convey the two sheets
of papers.
[0083] When a first sheet of paper (herein, the paper sheet P1) is
set to the holding part 19, the controlling part 50 makes the paper
feeding roller 14a send the paper sheet P1 to the conveying roller
14d, and when the paper sheet P2 is set on the paper sheet P1, the
controlling part 50 makes the paper feeding roller 14a not send the
paper sheet P2 to the conveying roller 14d. Then, the controlling
part 50 makes the conveying roller 14d convey the paper sheet P1
out of the paper sheet P1 and the paper sheet P2 that are held by
the holding part 19 to the printing part 12 while the paper feeding
roller 14a is in a state where the rotation is stopped
(specifically, stationary excitation is caused in a driving motor
of the paper feeding roller 14a). On this occasion, the paper sheet
P2 receives a frictional resistance of the contacted paper feeding
roller 14a and is not conveyed. Accordingly, even when the holding
part 19 holds the paper sheets P1 and P2, the paper sheets P1 and
P2 are not being multi-fed and the paper sheet P1 is properly
conveyed to the printing part 12.
[0084] FIG. 16 shows a state where there is no first paper roll 21.
If printing on the paper sheet P1 continues while the holding part
19 is holding the paper sheets P1 and P2, the first paper roll 21
runs out as shown in FIG. 16. Then, when the paper sheet sensor S1
detects that there is no paper sheet P1 to be conveyed to the
printing part 12, the controlling part 50 makes the conveying part
14 convey the paper sheet P2 held by the holding part 19 to the
printing part 12.
[0085] FIG. 17 shows a state where the paper feeding roller 14a
feeds the paper sheet P2. FIG. 18 shows a state where the conveying
roller 14d conveys the paper sheet P2. When the first paper roll 21
runs out, the controlling part 50 makes the paper feeding roller
14a feed the front end of the paper sheet P2 to the conveying
roller 14d as shown in FIG. 17. Then, after a predetermined time
(an estimated time for the front end of the paper sheet P2 to reach
the conveying roller 14d) passes from the time when the paper sheet
sensor S3 detects the fed paper sheet P2, the controlling part 50
stops the rotation of the paper feeding roller 14a and makes the
conveying roller 14d convey the paper sheet P2 as shown in FIG. 18.
In this manner, the paper sheet P2 can be properly conveyed to the
printing part 12 after the paper sheet P1 runs out.
[0086] FIG. 19 shows a state where the paper roll 22 is housed in
the first housing part 23. When the paper sheet sensor S1 detects
that there is no paper sheet P1 to be conveyed to the printing part
12, the controlling part 50 moves the second paper roll 22 housed
in the second housing part 24 to the first housing part 23 at the
time when the paper sheet P2 held by the holding part 19 is
conveyed to the printing part 12. Accordingly, the second paper
roll 22 comes to be housed in the first housing part 23 as shown in
FIG. 19.
[0087] As mentioned above, a convex part 26 is provided between the
first housing part 23 and the second housing part 24. Therefore,
the controlling part 50 makes the paper sheet P2 held by the
holding part 19 conveyed to the printing part 12 such that the
second paper roll 22 housed in the second housing part 24 runs over
the convex part 26 and moves to the first housing part 23.
Specifically, when the paper feeding roller 14a feeds the paper
sheet P2 towards printing part 12, the second paper roll 22 runs
over the convex part 26 by being pulled by the fed paper sheet P2
as shown in FIG. 17 and FIG. 18. Then, the paper roll 22 is moved
and housed in the first housing part 23 as shown in FIG. 19.
Accordingly, the second paper roll 22 in the second housing part 24
is automatically moved to the first housing part 23 after the first
paper roll 21 in the first housing part 23 runs out. Consequently,
the user can easily set an additional paper roll to the second
housing part 24.
[0088] Further, when the paper sheet sensor S 1 detects that there
is no paper sheet P1 while the printing part 12 is printing the
printing data on the paper sheet P1, the controlling part 50 makes
the paper sheet P2 held by the holding part 19 be conveyed to the
printing part 12 and makes the printing part 12 print the printing
data again on the paper sheet P2. Accordingly, even when a paper
sheet runs out during printing, the printing data is ensured to be
printed on a subsequent sheet of paper.
[0089] <4. Operation of the Printer>
[0090] An example of operation of the printer 11 when the first
paper roll 21 and the second paper roll 22 are set and the paper
sheets P1 and P2 are conveyed is described with reference to FIGS.
20 to 22. The operations explained below are realized by executing
a program that the controlling part 50 stores in the storing
part.
[0091] [4-1. At the Time when a First Paper Roll is Set]
[0092] FIG. 20 shows a flow chart of operations of the printer 11
when the first paper roll 21 is set in the first housing part 23.
The flow chart of FIG. 20 starts at the time when the printer 11 is
turned on (step S102). Next, the controlling part 50 detects that
there is no paper sheet in the holding part 19 with the paper sheet
sensor S1, and raises the paper feeding stage 14b from the
separated position to the holding position (step S104). Then, an
operator sets a first roll of the first paper roll 21 to the first
housing part 23 and sets the paper sheet P1, which is pulled out
from the first paper roll 21 by opening the opening-closing part
16, to the holding part 19.
[0093] When the paper sheet sensor S1 detects the paper sheet P1
set in the holding part 19 (step S106: Yes), the controlling part
50 rotates the paper feeding roller 14a to feed the paper sheet P1
to the conveying roller 14d (step S108). The fed paper sheet P1
reaches the conveying roller 14d by passing through the paper sheet
sensor S3 in the common conveying path R.
[0094] Next, when the paper sheet sensor S3 detects the paper sheet
P1 (step S110: Yes), the controlling part 50 makes the conveying
roller 14d start to convey the paper sheet P1 (step S112). Then,
the controlling part 50 stops the rotation of the paper feeding
roller 14a and moves the paper feeding stage 14b downwards from the
holding position to the separated position (step S114). In this
manner, the paper sheet P1 is then conveyed by the conveying roller
14d and is printed by the printing part 12.
[0095] [4-2. At The time when a Second Paper Roll is Set]
[0096] FIG. 21 shows a flow chart of operation of the printer 11
when the second paper roll 22 is set to the second housing part 24.
The flow chart of FIG. 21 starts when an operator opens the
opening-closing part 16 to set a second roll of the second paper
roll 22. First, the controlling part 50 detects that the
opening-closing part 16 is opened, and raises the paper feeding
stage 14b from the separated position to the holding position (step
S202). Then, the operator sets the second roll of the second paper
roll 22 to the second housing part 24 and sets the paper sheet P2,
which is pulled out from the second paper roll 22, on the paper
sheet P1.
[0097] Next, when the paper sheet sensor S1 detects two sheets of
paper (step S204: Yes), the controlling part 50 causes stationary
excitation in a motor connected to the paper feeding roller 14a and
fixes the paper feeding roller 14a (step S206). In this manner,
when the conveying roller 14d rotates to convey the paper sheet P1,
the paper sheet P2 receives a frictional resistance of the paper
feeding roller 14a and is not conveyed.
[0098] [4-3. At the Time when a First Paper Roll Runs Out]
[0099] FIG. 22 shows a flow chart of operation of the printer 11
when a first roll of the first paper roll 21 runs out. First, the
controlling part 50 detects whether or not the number of sheets of
paper held by the housing part 19 changes from two to one with the
paper sheet sensor S1 (step S302). When the first paper roll 21
runs out and the paper sheet sensor S1 detects that the number of
sheets of paper is one (step S302: Yes), the controlling part 50
discharges the paper sheet P1 remaining on the common conveying
path R (step S304).
[0100] Next, the controlling part 50 rotates the paper feeding
roller 14a and feeds the paper sheet P2 held by the holding part 19
to the conveying roller 14d (step S306). The fed paper sheet P2
passes the paper sheet sensor S3 in the common conveying path R and
reaches the conveying roller 14d. On this occasion, the second
paper roll 22 housed in the second housing part 24 is pulled by the
paper sheet P2 to be fed and is moved to the first housing part
23.
[0101] Next, when the paper sheet sensor S3 detects the paper sheet
P2 (step S308: Yes), the controlling part 50 makes the conveying
roller 14d start to convey the paper sheet P2 (step S310). Then,
the controlling part 50 stops the rotation of the paper feeding
roller 14a and moves the paper feeding stage 14b downwards from the
holding position to the separated position (step S312). In this
manner, the paper sheet P2 is then conveyed to the conveying roller
14d and is printed by the printing part 12.
[0102] <5. An Effect According to the Present Exemplary
Embodiment>
[0103] In the printer 11 according to the present exemplary
embodiment, the paper sheet P1 out of the paper sheet P1 and the
paper sheet P2 held by the holding part 19 in the common conveying
path R is conveyed to the printing part 12 and is printed. Then,
when the paper sheet sensor S1 detects that there is no paper sheet
P1 to be conveyed to the printing part 12, the conveying part 14
conveys the paper sheet P2 held by the holding part 19 to the
printing part 12. In such a case, even when the first paper roll 21
and the second paper roll 22 are set to the printer 11, the holding
part 19 in the common conveying path of the paper sheet P1 and the
paper sheet P2 can convey each paper sheet one by one to the
printing part 12 without multi-feeding the paper sheet P1 and the
paper sheet P2. Consequently, each paper sheet of a plurality of
paper rolls can be conveyed to the printing part 12 with a simple
configuration with no conveying paths dedicated respectively for
the paper sheets P1 and P2.
[0104] The present invention is applied to the printer 11 that is a
printing apparatus in the above, but it is not limited to this. For
example, the present invention is applicable to a paper supply
apparatus with no printing part (for example, a paper supply
cassette).
[0105] Further, the holding part 19 consists of the paper feeding
roller 14a and the paper feeding stage 14b in the above, but it is
not limited to this. For example, the holding part 19 may consist
of the paper feeding roller 14a and a roller opposing the paper
feeding roller 14a. Further, the holding part 19 may include a
roller with no conveying function instead of the paper feeding
roller 14a.
[0106] The present invention is described with the exemplary
embodiments of the present invention but the technical scope of the
present invention is not limited to the scope described in the
above embodiment. It is apparent for those skilled in the art that
it is possible to make various changes and modifications to the
embodiment. It is apparent from the description of the scope of the
claims that the forms added with such changes and modifications are
included in the technical scope of the present invention.
* * * * *